Brake for power-looms



l KTTED STATES PATENT OFFICE.

RENSSELAER REYNOLDS AND GORDON B. REYNOLDS, OF STOCKPORT, NEW YORK.

BRAKE FOR POWER-LOOMS.

Specification of Letters Patent No. 24,488, dated June 21, 1859.

To all whom it may concern:

Be it known that we, RENSSELAER REY- NOLDS and GORDON B. REYNOLDS, both of Stockport, in the count-y of Columbia and State of New York, have invented a new and Improved Mode of Applying Brakes to Power-Looms; and we do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l, is a side view of part of the framing of a loom, its driving gears, and brake, and the mechanism for operating the brake. Fig. 2, is a back view of the same, and Fig. 3, a top view of the same.

Similar letters of reference indicate corresponding parts in the several figures.

Our invention consists in so applying and arranging the brake to act upon both the crank and cam shaft of a power loom whereby after having'stopped the loom, it is made to prevent effectually any recoil, and yet is prevented binding upon the surfaces upon which it produces friction and thereby inter fering with the starting of the loom.

To enable `others skilled in the art to make and use our invention we will proceed to describe its constructon and operaton.

A, is one of the side frames of the loom.

B, is the crank shaft; and C, the cam shaft.

D, is the smaller gear on the crank shaft and E, the larger gear on the cam shaft, each made with a projecting rim a, on its outer side for the brake to act upon.

F, is the brake having two faces CZ, e, of curved form corresponding with the outer perpheral surface of the rim a, a, of the two gears, as shown in F ig. l, the face d, to act upon the smaller gear D, and the face c, on the larger gear E. This brake is fitted to swing on fixed pin o, which is secured in the frame A, with its axis parallel with the shafts, C. The pin o, which constitutes the center of motion of the brake is so arranged relatively to the centers of the shafts Band C, and the hole in the brake which fits to the said pin so arranged relatively to the faces d, e, that the face c,`comes into action nearer to a position directly between the centers b, B, than the face al, does to a position directly between the centers o, C, which gives the face CZ, an advantage over the face c, in their respective operations, the

importance of which will be presently eX- plained.

G, is the protector lever attached in the usual manner by a fulcrum pin c, to the breast beam H, of the loom.

f, is the rod connected with the outer extremity of the protector lever and passing through the arm c, of the brake in front of which the said rod has upon it a nut g, which is adjust-able on a screw thread cut on the said rod. f The operation of the brake is as follows When the shuttle fails to box, by being stopped in its passage through the web or thrownl out by some obstacle, the protector pin, striking the inner end of the protector lever in the usual manner and driving it toward the breast beam causes the outer end of the said lever to be moved toward the gear and thus by its nut g, to force back the arm c, of the brake and bring the faces fl, e, into operation on the rims a, a, of the two gears'D, E, simultaneously, thus instantly stopping the revolution of the gears in the direction of the respective arrows shown upon them in Fig. l, and so stopping the lom in its forward movement without any 'concussion of the teeth of the gears. Vhen the loom is stopped the lay has generally a tendency to recoil and so carry back the gears in the opposite direction but this is prevented by the arrangement-v of the brake as before described so that its face d, has an advantage over the face c, in their respectiveope'rations; for as soon as the gears have any tendency to turn in the reverse direction the friction of the gear D, upon the face d, tends to move the brake in a direction to increase its pressure on bot-h the rims a, a, and thus prevents the smash which the recoil is so likely to produce. The above advantage also secures the infallible disengagement of the brake when the loom isjstarted again for when the gear D, is rotating in the forward direction in contact with the face d, its friction always tends to throw the brake out of operation, and when the brake is relieved of the pressure of the protector' lever there is no means of counteracting this tendency. It is obvious that instead of applying the brake to projecting rims a, a, on the gears, it can be applied in an equivalent manner to act on c wheels specially provided on the shafts for the purpose.

l/Vliat we claim as our invention and deof the loonivby the action ofthe protector, 10

Sire to seure by Letters Patent, is, but self liberating, When the loom is started' Applying and arranging the two faces of l again as herein fully set forth. the brake relativel7 to its center of inotion, y 1 T T 5 and the seid center of motion relatively to Y the centers of the crank and. Cani shafts in the manner substantially as described, Vitnesses: whereby the brake is not only rendered an- O. D. MUNN,

tornati@ in case of recoil after the stoppage JJVV. COOMBS. 

